Core drill



Nov. 22, 1927.

C. F. OSGOOD CORE DRILL Filed Nov. -5. 1923 Patented Nov. 22, 1927.

UNITED STATES 1,650,384 PATENT OFFICE.

CHARLES F. OSGOOD, OF CLAREMONT, NEW HAMPSHIRE, ASSIGNOR 'I'O SULLIVAN MACHINERY COMPANY, A CORPORATION OF MASSACHUSETTS.

CORE DRILL.

Application filed November 5, 1923. Serial No. 672,752.

My invention relates to core drills.

It has for its object to provide an improved core barrel and more particularly a core barrel adapted to use with mud fluid and 5 in oil or gas well drilling.

In the accompanying drawings I have shown for purposes of illustration two forms which my invention may assume in practice.

In these drawings.

Fig. l is a side elevation partially in vertical section of the bit carrying end of a barrel constructed in accordance with my improvement.

Fig. 2 is a transverse sectional view on Y,

line 22 of Fig. 1.

Fig. 3 is a detail view of a modified form of inside tube.

In this illustrative construction I have provided a core barrel externally winged throughout its length and comprising a barrel member 1 and abit member 2 preferably of identical cross section externally, the cross section of each of the membersherein being cruciform and as shown in Fig. 2. Moreover and carries therein acore lifter 7 ofa usualresilient or split type and the inner periphery of the bit is longitudinally fluted as shown at 8 to permit the free passage of the fluid to the bottom of the hole.

In Fig. 3 I have illustrated a modified form of tube 3 having external longitudinal flutes 9 in its outer periphery, this construction enabling the flow of a greater amount of fluid and being adapted to use with the present construction whenever desired and with or without corresponding enlargements of the fluid passage means through the core litter and those in the inner periphery of the bit.

As a result of my improved construction it will be noted that a barrel of winged external shape is provided which at the same time that it is adapted to permit the supply of a large quantity of fluid to the bottom-of the hole, does so without causing the fluid to come in contact with the core save at the bottom of the hole, this improved conit will be noted that the barrel 1 is of a usual st-ruction being especially desirable whereby reason of the character of the core it is not-desirable for the fluid to come in contact with the core or where it is not desired to provide down passages in the member 1 or bit 2 Or through the wings on said members.

Moreover, it will be noted that this improved;

construction is obtainable while still retaining the desired external characteristics of a mud working core barrel including the wings adapted to slap the mud fluid intothe hole, and also adapted to provide ample clearance for the up-flow of fluid, and to act as guides for the barrel.

WhileI have in this application specifi cally described two forms which my invention may assume in practice. it will be understood that these forms of the same are shown for purposes of illustration and that the invention may be modified and embodied in various other forms without departing from its spirit or the scope of the appended claims.

What I claim as new and desire to secure by Letters Patent is:

1. A core barrel including a bit and winged externally throughout its length and having adouble tube internal fluid connection leading to the bottom of the hole. I

2. A core barrel including a bit and winged externally throughout its length and having a double tube internal fluid connection leading to the bottom of the hole and fluid passage means in the inner periphery of its bit.

'3. A core barrel winged externally throughout its length and having a double tube internal fluid connection leading to the bottom of the hole and a bit of the same external diameter as the body of the barrel.

4. A core barrel including a bit and winged externally throughout its length and having a double tube internal fluid connection leading to the bottom of the hole, said connection including an inner tube of smaller external diameter than the internal diameter of the barrel and having fluid passages in its external periphery.

5. A core barrel comprising externally fluted inner and outer barrel members, said outer barrel memberhaving longitudinally extending projecting wings between the flutes thereon, and a bit carried by one of said members.

6. A core barrel comprising externally fluted inner and outer barrel members, said outer barrel member having longitudinally extending projecting wings between the flutes thereon, and a bit having flutes communicating with the flutes in said members.

7. A core barrel. including an externally fluted outer barrel member having longitudinally extending projecting wings between the flutes thereon, an externally fluted inner barrel member, an internally and externally fluted bit carried by said outer member, and means for delivering fluid through the flutes in said inner barrel member, the internal flutes in said bit to the bottom of the hole, and from the hole through the external flutes in said bit and said outer barrel member, the fluid flowing between the wings on said latter member.

8., A core barrel comprising a hollow outer barrel member having longitudinally extending projecting Wings, an inner barrel member, a bit secured to said outer member having wings alined with the wings of the latter, said bit being internally fluted, and means for delivering fluid between said barrel members through the flutes in said bit to the bottom of the hole.

9. A core barrel including a barrel member having projecting wings, an alined bit section having similar projecting wings alined with the wings on said barrel member, an inner barrel member, and means for delivering fluid between said barrel members to the bottom of the drill hole and external- 1y from the hole between the wings on said bit section and the outer barrel member.

10. A core barrel including an externally fluted outer barrel member having longitudinally extending projecting wings between the flutes thereon, an inner barrel member, an internally and externally fluted bit carried by said outer barrel member, and means for delivering fluid between said barrel members through the internal flutes in said bit to the bottom of the hole.

11. A core barrel including an externally fluted outer barrel member having longitudinally extending projecting wings between heflutes thereon, an inner barrel member,

an internally and externally fluted bit carried by said outer barrel member, and means for delivering fluid between said barrel members through the internal flutes in said bit to the bottom of the hole, and from the hole through the external flutes in said bit and said outer barrel member, the fluid flowing between the wings on said latter member.

12. A core barrel including an outer barrel member, an inner barrel member adapted to receive a core, and a bit, said outer barrel member and said bit being winged externally throughout their length, and means to supply fluid externally of said inner barrel member through said bit to the bottom of the hole. I

In testimony whereof I aflix my signature.

CHARLES F. OSGOOD. 

